import 'package:flutter/material.dart';
import 'package:flutter_test_run/volume_slider.dart';
import 'package:flutter_test_run/music_list_slider.dart';


void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter NB',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        // This is the theme of your application.
        //
        // TRY THIS: Try running your application with "flutter run". You'll see
        // the application has a purple toolbar. Then, without quitting the app,
        // try changing the seedColor in the colorScheme below to Colors.green
        // and then invoke "hot reload" (save your changes or press the "hot
        // reload" button in a Flutter-supported IDE, or press "r" if you used
        // the command line to start the app).
        //
        // Notice that the counter didn't reset back to zero; the application
        // state is not lost during the reload. To reset the state, use hot
        // restart instead.
        //
        // This works for code too, not just values: Most code changes can be
        // tested with just a hot reload.
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
      ),
      home: const MyHomePage(title: 'Flutter Demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // TRY THIS: Try changing the color here to a specific color (to
        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
        // change color while the other colors stay the same.
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          //
          // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
          // action in the IDE, or press "p" in the console), to see the
          // wireframe for each widget.
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text('You have pushed the button this many times:'),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headlineMedium,
            ),
            ElevatedButton(
              onPressed: _showVolumeSlider,
              child: const Text('Show Volume Slider'),
            ),

            ElevatedButton(
              onPressed: _showMusicList,
              child: const Text('Show Music List'),
            ),

          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }

  void _showMusicList() {
    showModalBottomSheet(
        context: context,
      constraints: BoxConstraints(
        maxWidth: MediaQuery
            .of(context)
            .size
            .width,
      ),
      builder: (BuildContext context) {
        return MusicListSlider();
      },
    );
  }

  void _showVolumeSlider() {
    showModalBottomSheet(
        context: context,
        shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(20.0)),
        backgroundColor: Colors.transparent,
        constraints: BoxConstraints(
          maxWidth: MediaQuery
              .of(context)
              .size
              .width - 40,
        ),
        builder: (BuildContext context) {
          return Transform.translate(
            // offset: const Offset(0, -270), // 向上偏移
            offset: const Offset(0, -70), // 向上偏移
            child: VolumeSlider(),
          );
        });
  }
}


class MusicListSlider extends StatefulWidget {
  const MusicListSlider({super.key});

  @override
  _MusicListSliderState createState() => _MusicListSliderState();
}

class _MusicListSliderState extends State<MusicListSlider> {
  // 当前播放的音乐索引
  int _currentPlayingIndex = 0;

  // 音乐列表数据
  final List<Map<String, String>> _musicList = [
    {'title': '夜曲', 'artist': '周杰伦'},
    {'title': '青花瓷', 'artist': '周杰伦'},
    {'title': '稻香', 'artist': '周杰伦'},
    {'title': '告白气球', 'artist': '周杰伦'},
    {'title': '七里香', 'artist': '周杰伦'},
    {'title': '晴天', 'artist': '周杰伦'},
    {'title': '爱在西元前', 'artist': '周杰伦'},
    {'title': '半城烟沙', 'artist': '许嵩'},
    {'title': '如果当时', 'artist': '许嵩'},
    {'title': '素颜', 'artist': '许嵩'},
    {'title': '素颜', 'artist': '许嵩'},
  ];

  // 切换播放音乐
  void _playMusic(int index) {
    setState(() {
      _currentPlayingIndex = index;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      decoration: BoxDecoration(
        color: Colors.white,
        borderRadius: BorderRadius.circular(20), // 圆角
      ),
      height: 800,
      padding: const EdgeInsets.all(20),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          const Text(
            '播放列表',
            style: TextStyle(
              fontSize: 18,
              fontWeight: FontWeight.bold,
            ),
          ),
          const SizedBox(height: 10),
          Expanded(
            child: ListView.builder(
              itemCount: _musicList.length,
              itemBuilder: (context, index) {
                final bool isPlaying = index == _currentPlayingIndex;
                return GestureDetector(
                  onTap: () => _playMusic(index),
                  child: Container(
                    margin: const EdgeInsets.symmetric(vertical: 4),
                    padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 8),
                    decoration: BoxDecoration(
                      color: isPlaying ? Colors.blue.withOpacity(0.2) : Colors.transparent,
                      borderRadius: BorderRadius.circular(10),
                    ),
                    child: Row(
                      children: [
                        Icon(
                          isPlaying ? Icons.play_circle : Icons.music_note,
                          color: isPlaying ? Colors.blue : Colors.grey,
                        ),
                        const SizedBox(width: 10),
                        Expanded(
                          child: Column(
                            crossAxisAlignment: CrossAxisAlignment.start,
                            children: [
                              Text(
                                _musicList[index]['title']!,
                                style: TextStyle(
                                  fontSize: 16,
                                  fontWeight: isPlaying ? FontWeight.bold : FontWeight.normal,
                                  color: isPlaying ? Colors.blue : Colors.black,
                                ),
                              ),
                              Text(
                                _musicList[index]['artist']!,
                                style: TextStyle(
                                  fontSize: 14,
                                  color: Colors.grey[600],
                                ),
                              ),
                            ],
                          ),
                        ),
                        if (isPlaying)
                          const Icon(
                            Icons.volume_up,
                            color: Colors.blue,
                            size: 20,
                          ),
                      ],
                    ),
                  ),
                );
              },
            ),
          ),
        ],
      ),
    );
  }
}

